Speed-controlling apparatus.



BEST A AILABLE COPY" J. T. HUME.

SPEED CONTROLLING APPARATUS.

APPLICATION FILED DEG.14, 1911. I Patented Dec. 16, 1913 a amine-snarl.

422% (um (u J. T. HUME.

SPEED CONTROLLING APPARATUS.

APPLICATION FILED D2014. 1M1.

Patented Dec. 16, 19 13 2 SHEETS-SHEET 2.

. STATES PATENT OFF I JOfiN T. Home, or'o'nrcaoo HEIGHTS, ILLINOIS,'AssIenoR T0 CHICAGO PNEUMATIC TOOL 00., or cnIoAeo, ILLINOIS. Y

SPEED-CONTROLLING APPARATUS.

To all whom it may concern .Be it'known that I, JOHN T. HUME, a citi-Zen of the United States; residing at Chicago Heights, in the county ofCook and State of Illinois, have invented a certain new and usefulIinproi-ementin Speed-Controlling Apparatus, of which the following isafull, clear, concise, and exact,description, reference being had to theaccempanying drawings, forming a part of this specification.

My invention relates, tolcontrolling devices and more particularly tospeed controlling devices andhas for its object the provision of animproved device-which may be attached to any suitable prime mover tocontrol its operation. 5

In the preferred form' of the invention -which is the form illustratedherein, theglevice is applicable particularly in connection withexplosive engines and when the device is soapplied it provides suitablecontrolling facilities which may prevent operation of said explosiveengine bey nd a certain definite speed. In the form herein shown thedevice is self-contained and has suitable circuit controlling devices,which circuit con trolling devices are automatically operated upon andcontrolled by a governor.

The form of the invention which is illustratedherein has suitablegoverning appliances responsive to changes in speed and these governingdevices preferably "arry the spark controlling elements of the explo-When the device is desired to prevent operation beyond a certainpredetermined speed limit, then the governing appliances are so arrangedthat should the speed exceed a given predetermined amount, the deviceprevents the establishment of the necessary conditions whereby anexplosion is occasioned. When the speed is reduced to normal the deviceagain permits the explosions. to take place in the normal way.

In describing the specific form of the invention herein both in what haspreceded and in the specific descriptionthat will follow, it is notmeant to limit the invention to this particular form as the invention iscapable of wide variation and use and in a variet of different ways. Iwill lowever descri specifically a' form of carry in'gout.the'il'lftention in connection with the! accomspecification of LettersPatent.

panying drawings illustrating said fcu, in

I Patented Dec. 16, 1913. Application filed December 14, 1911. SerialNo. 665,753.

which Figure l is a plan view oi the device with the cover removedillustrating various parts; Fig. 2 is a similar view showing the devicein its normal operating condition; Fig. 3 is a similar view showing thedevice in an alternate condition; Fig. i is a central View of themovable elements of the device viewed from the opposite side illustratedin Figs. 1, 2 and S; Fig. 5 a sectional view on line (is-a of 2, andFig. 6 is a diagram of '65 the circuit arrangements.

Referring more particularly to Fig.6, in.

order to describe the general operation of the device I set forth tw-ospark plugs 1, '1,

respectively associatedwith secondary windings 2, 2, which secondarywindings are in inductive relation with primary windings 3, A battery atgrounded at 5 furnishes the necessary current and the spark plugsaresuitably grounded at 6, G, the ground representing preferably the frameof the gas engine with which the device 'is associated. The circuitthrough the primary windings 1S controlledby contact rollers 7, 7 whichare preferably insulated from the cup shaped S0 casing 8' of the device,and contact 1s.estab-' 'lished between the frame of the machine 9 andthe rollers 7, 7 through the agency of a roller 10 rotatably mountedabout a shaft 11. Suitable governing devices to be explained hereinafterpermit engagement between the roller 10 and the rollers 7, 7 as theshaft 11- is being rotated, but prevent contact between the elements '10and 7 should the speed of the shaft 11 exceed a predetermined amount.Thus if the engine isrunniug' at a speed below a predetermined amount,then the roller 10 normally engages. the rollers 7, 7 to permit sparkingconditions to be established at the spark plugs 1,

1,- but when the speed exceeds a predetermined amount, the roller 10 asit is'carried about the shaft 11 fails to engage the rollers 7 a ndthusthe engine misses an explosion "or more it necessary until the speedof the engine is reduced to the proper predeter mined amount. This willserve to explain the general features of the.- device and the specificconstruction will now be set forth" in connection with the remainingviews.

The deviceitself consists of a cylindrical casing 8 which has at oneside a bearing 9 for theshaft. 11 and which casing is provided witha'cap 12 screw threadedly associated with the casing 8 which alsocarries a hearing 13 to accommodate the shaft 11. Two contact rollers 7,7 are rotatably mounted about the stems 14, 14 and these stems areheldin place Within the casing bymeans of nuts 15, 15. Suitableinsulation 16, -16

and 17, 17 is provided so that the elements 14: and 7 are'notelectrically associated with the casing 8. The rollers may rotate abouttheir respective stems.

ed at 9 (Fig. 6), the ground again preferably being the framework of theexplosive engine. The roller which periodically engages the rollers 7,7. to make contact therewith is rotatably mounted upon a stem 18 carriedby an element 19. A second element 20 similarin form to the element 19but oppositely disposed is'provided with aslot 21 through which thestem" 18 projects so as to permitplay between the elements 19 and '20.-The elements 19 and 20 are re spectively rotatably mountedfnpon a V saped arm 22 by meansof pins or bolts 23. The V'shaped arm 22 is'fixedlysecured. to

the shaft 11 and thus as the shaft-rotatesthe elements 10, 19, 20 and 22are carried around with the said shaft. The great bulk of the: weight ofthe elements 19 and 20 is abtheir. free extremities as is apparent andthe faster the'shaft rotates the farther these e ements 19 and'20 attheir free extremities tend to separate by reason of the centrifugalforce. The greater the separation between the ele nients 19 and 20 attheir free extremities, the

farther is the roller 10 carried radially toward the axis of the shaftll'and when'the separation has reached a predetermined amount the roller10' in its rotation fails to' engage the rollers 7, 7 under whichconditionsthe engine misses ltS explosion. -A spring 24 fastened betweenpins25 and 26 tends to hold the elements 19 and 20 together and thestrengthof this spring controLs said elements' 19 and 20 so-that theproper separation due to centrifugal force 24 may be placed underadditional tension may occur: at the proper time. .'An additional pin 27is provided so that the spring so as to change the speed limit at whichthe device is 'opcrative to withhold sparkingcouditions. It will thus beseen that the device acts as a combined circuit controller and governor,and as such maybe used in a variety of different. ways and underdifferent though equivalent conditions.

Having thus described OHIOTU1 which my inycntion may take, which formisnot in- It may be said fu1- ther that the roller 10previously-referred 'to is electrically connectedwith .the casing '8 aswill appear and this casing 8 is grounddesire to secure by LettersPatent is:

periodic, engagement .with' said first afore said circuit controllingelement, a shaft,- an

:ern'or ivoted on said arm and carrying said secomf'circu'it controllingelement having means to move said second circuit controlling, elementradially in response to the movement of said governor.

ondcircuit controlling. element adapted for arm fixedly secured to saidshaft, and a governor ivoted on said arm and carrying said secondcircuit controlling element having means tomove said second .circuitcontrolling element radially in response to the movement of saidgovernor.

comprising a shaft, a stationary framework associated therewith, acircuitcontrolling element mounted upon said frameworkan arm carriedbsaidshaft, a centrifugal'governor pivota y mounted ong-saidgarm, and asecondcircuit controlling element carried by said governormovablefradiall with respect to said shaft imresponse movements of-saidgovernor..-1

7 having aflshaft, a stationaryfiframework' a circuit. controllingelementr carried f by said cent-rife l. Qg'zivernori elements pivotallyby one of said gorernor elements.

having a shaft,- a -stationary framework, acircuitcontrolli-ngelementcarried by said framework, a 'pair' of radial arms. carried bysaid shaft, :1 pair-of symmetrically ara second circuit controlling eement carried by one ofsaidgovernor elements, and res1lient-'meansassociated with said governor elements tending to hold them in theirretracted position.

my name this first day of December, A..D., 1911. J OHNT. HUME.

Witnesses:

HAZEL Jonas,

O. M. Wnnmon.

tended to limit the broad features of the invention thereto, what Iclaim as new and mounte respectively upon "said-arms, and a. second.circuitcontrolling element carried 1". A device .of the characterdescribed havingfa circuit controlling element, a sec- 0nd circuitcontrolling element. adapted, for 4 arm fixedly secured to said shaft,and a gov- *2;A..devioe of the character.- described havingacircuitcontrolling element, a secperiodic engagement-with said first aforesaidcircuit controlling -element, a shaft, an-

3. Af-device of he character described framework, it pairofradial armscarried by said shaft,a pa ir of symmetrically arranged 5. A deviceofthecharacter. describedranged centrifugal governor elements pivotallymounted respectively .11 on said arms,

In witness whereof, I hereunto Subscribe, 120

